Purpose
This report provides information about the tuning of the NARC mountaintop station HF antennas as of 2020-10-26.
Summary
- The 160m dipole on the 80’ North tower is no longer resonant on the band.
- We suspect corrosion in a connector at the base of the tower.
- The 40m dipole on the 60’ West Tower is down and needs to be put back up again.
Recommendations
- A work day should be scheduled soon to diagnose problems with the antennas and determine what repairs we can make on our own vs. those that require assistance.
- The mountaintop management team (K3ROG, N3LI, W3EDP) should develop a regular antenna testing and reporting regime.
Tower-by-tower
80’ Middle Tower
Antennas
- VHF 4 element vertical orientation Yagi + rotator
- 2 VHF fixed direction vertical orientation 6 element Yagis (W3YA system)
- VHF vertical
- 40m dipole oriented NW/SE
80’ North Tower
Antennas
4 element Mosely CL-33-M-WARC triband (10, 15, 20m + WARC) Yagi
- Fell during late winter 2020
- Disassembled
- Need to identify and order new parts
- 160m dipole oriented NW/SE
- 80m dipole
60’ East Tower
Antennas
- VHF vertical
- 80m dipole oriented N/S
Antenna plan
We developed and implemented an antenna plan in 2010.